code: def arr_dtype_number(arr, num):
      """Return dtype for given number of items per element"""
      return np.dtype(arr.dtype.str[:2] + str(num))
  
imports: from __future__ import division, print_function, absolute_import
  import sys
  import operator
  from scipy._lib.six import reduce
  import numpy
  from scipy.misc import doccer
  from .None import byteordercodes
label_desc: Use image node_id 5 for calling a global function with example usage: arr_dtype_number(arr, num) and returns: np